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Message: <blockquote data-quote="Mika.B" data-source="post: 1315460" data-attributes="member: 219911">I've had my Macbook Pro 13" since around June 2010 (so I've been thrashing it for almost a year and a half).BUT in the last few weeks, it's started making a sound it never has before. It's low in key, and it's almost like a gentle, slowish rumble or vibration noise (it doesn't actually vibrate, it just sounds like it). It reminds me of having a sore throat, the noise is raspy and...scratchy...or like a tiny dirt bike. There are random moments when the noise is louder and quicker for not more than a second. And then at times it's so quiet, it's almost not there.It's been the perfect computer since I bought it, quiet, efficient with only the occasional freeze or heat up from having too many programs open at one time. So this is the first thing out of place- I want to make sure I tackle the issue before it becomes a problem. The software is NOT running any slower than usual.Plus, I've dropped it once, 7 months ago. It didn't seem like any damage had been done. But now there's this noise.Thanks for any advice you might share. I really appreciate it <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></blockquote>

Verification: How many occurrences of a n-u-m-b-e-r between "d" and "f" in this example...(sdgs6ngklu3gd#f9%)?